R: Optimal Partition (classification).

pop {amap} | R Documentation

## Optimal Partition (classification).

### Description

Classification: Computing an Optimal Partition from Weighted Categorical Variables or from an Array of Signed Similarities.

### Usage

    pop(x,fmbvr=TRUE,triabs=TRUE,allsol=TRUE)

### Arguments

`x` | A dissimilarity matrix
`fmbvr` | Logical, TRUE: look for the exact solution
`triabs` | Logical, TRUE: try to init with absolute values
`allsol` | Logical, TRUE all solutions, FALSE only one solution

### Author(s)

Michel Petitjean, http://petitjeanmichel.free.fr/itoweb.petitjean.class.html

R port by Antoine Lucas,

### References

Theory is explained at http://petitjeanmichel.free.fr/itoweb.petitjean.class.html

Marcotorchino F. Agr\'egation des similarit\'es en classification automatique. Th\'ese de Doctorat d'Etat en Math\'ematiques, Universit\'e Paris VI, 25 June 1981.

Petitjean M. Agr\'egation des similarit\'es: une solution oubli\'ee. RAIRO Oper. Res. 2002,36[1],101-108.

### Examples

    ## pop from a data matrix
    data <-
    matrix(c(1,1,1,1,1
            ,1,2,1,2,1
            ,2,3,2,3,2
            ,2,4,3,3,2
            ,1,2,4,2,1
            ,2,3,2,3,1),ncol=5,byrow=TRUE)

    pop(diss(data))

    ## pop from a dissimilarity matrix

    d <-2 * matrix(c(9,  8,  5,  7,  7,  2
    ,  8,  9,  2,  5,  1,  7
    ,  5,  2,  9,  8,  7,  1
    ,  7,  5,  8,  9,  3,  2
    ,  7,  1,  7,  3,  9,  6
    ,  2,  7,  1,  2,  6,  9),ncol=6,byrow=TRUE) - 9

    pop(d)

    ## Not run:
    d <- 2 * matrix(c(57, 15, 11, 32,  1, 34,  4,  6, 17,  7
    , 15, 57, 27, 35, 27, 27, 20, 24, 30, 15
    , 11, 27, 57, 25, 25, 20, 34, 25, 17, 15
    , 32, 35, 25, 57, 22, 44, 13, 22, 30, 11
    ,  1, 27, 25, 22, 57, 21, 28, 43, 20, 13
    , 34, 27, 20, 44, 21, 57, 18, 27, 21,  8
    ,  4, 20, 34, 13, 28, 18, 57, 31, 28, 13
    ,  6, 24, 25, 22, 43, 27, 31, 57, 30, 15
    , 17, 30, 17, 30, 20, 21, 28, 30, 57, 12
    ,  7, 15, 15, 11, 13,  8, 13, 15, 12, 57),ncol=10,byrow=TRUE) - 57

    pop(d)

    ## End(Not run)

[Package amap version 0.8-18 Index]